Flow Switch – Models Q-8DS, QD-8DS Pool
Monitoring fluid flow in:
- Air Conditioning Systems
- Industrial Refrigeration Systems
- Cooling in Data Centers
- Pools and Spas
- Chillers
- Scrubbers
- Fluid Blending Systems
- Water Treatment Systems
- Natural Gas
Contact Us (800) 562-2447
Local number: (805) 988-6800
Monitoring fluid flow in:
| PIPE SIZE | CONTINUOUS SWITCH POINT ADJUSTMENT RANGE | SHAFT LENGTH | PADDLE SIZE |
|---|---|---|---|
| 1″ | 12 to 20 GPM | 1 | 2 |
| 24 to 34 GPM | 1 | 1 | |
| 11/2″ | 16 to 28 GPM | 2 | 3 |
| 25 to 37 GPM | 2 | 2 | |
| 38 to 70 GPM | 2 | 1 | |
| 2″ | 30 to 50 GPM | 2 | 3 |
| 44 to 65 GPM | 2 | 2 | |
| 67 to 90 GPM | 2 | 1 | |
| 3″ | 45 to 140 GPM | 3 | 3 |
| 100 to 145 GPM | 3 | 2 | |
| 152 to 200 GPM | 3 | 1 | |
| 4” | 80 to 170 GPM | 3 | 3 |
| 175 to 240 GPM | 3 | 2 | |
| 160 to 290 GPM | 3 | 1 |
HYSTERESIS (Δ FLOW RATE TO ACTIVATE/DEACTIVATE SWITCH)
≈ 10% at upper end of flow range
≈ 30% at lower end of flow range
DIFFERENTIAL PRESSURE DROPS ACROSS UNIT
Under normal operating conditions:
≈ 1″–3″ pipe, less than 0.5 psi
≈ 4″–10″ pipe, negligible
WORKING LINE PRESSURE:
50 psi max., operating @ 180˚F 100 psi max. non-operating @ 180˚F Pressure over 50 psi can affect the switch point range
ELECTRICAL SWITCH CHARACTERISTICS
SPDT (single pole double throw) 15A, 1/2 hp @ 125 or 250VAC .A @ 125VDC (tungsten lamp load) 10,000,000 Operations Median
Model Q-8DS can also be fitted with a SPDT Gold Cross Bar Switch for computer/PLC interface.
